You can still use `ppm`, but it is not recommended. Run *CPAN client* from the *Strawberry Perl* or *Strawberry Perl (64-bit)*, sub folder *Tools*, entry in the Start menu.

Type `install Module::Name` there.


As [Alexandr says][1], you can use the CPAN client via the start menu. You can also install modules just as you would on Unix from the DOS window:

    perl -MCPAN -e shell
    install Quantum::Entanglement

You can also download the .tar.gz from CPAN, unzip it and install as you would in Unix:

    cd Module-Name-1.23
    perl Makefile.PL
    dmake
    dmake test
    dmake install

You may need to make sure your [%PATH%][2] environment variable has the right entry to get to Strawberry Perl, and does not contain other copies of dmake or gcc, which will sometimes lead to headaches.

  [1]: https://stackoverflow.com/questions/6643939/installing-modules-using-strawberry-perl/6644328#6644328
  [2]: https://en.wikipedia.org/wiki/PATH_(variable)




Change the directory:

    cd C:\Strawberry\perl\bin

Then

    C:\Strawberry\perl\bin&gt;cpan Lingua::EN::Sentence

and the module will install automatically.



CPAN is the easiest installation method.

As [Alex has noted][1], you may have to download a .tar.gz and unzip it. Since he wrote his answer, Strawberry Perl has deprecated [dmake][2], and you should use [gmake][2] instead.

  [1]: https://stackoverflow.com/questions/6643939/installing-modules-using-strawberry-perl/6644519#6644519
  [2]: https://en.wikipedia.org/wiki/Make_(software)#Derivatives


I have a view that displays multiple images and those images&#39; associated tags. I decided to use a partial view for each image and its tags, but I am having trouble passing in the image object into the partial view. Here is the main view&#39;s relevant code:

    &lt;table&gt;
      &lt;% @images.each do |i| %&gt;
        &lt;tr&gt;
          &lt;%= render :partial =&gt; :image_tag, :image =&gt; i %&gt;
        &lt;/tr&gt;
      &lt;% end %&gt;
    &lt;/table&gt;

Here is the partial view&#39;s relevant code (partial view is named _image_tag.html.erb):

    &lt;table&gt;
      &lt;%= image.id %&gt;
      &lt;%= image_tag image.src %&gt;
    &lt;/table&gt;

I read in [this][1] thread that I can pass in the image object the way that I am currently doing it. I tried passing in the id through an options hash on the render method, and that also didn&#39;t work. The error I am getting is:

    undefined method `model_name&#39; for Symbol:Class

centered around the line where I am calling render :partial in the main view.


  [1]: https://stackoverflow.com/questions/4700617/pass-an-variable-into-a-partial-rails-3

Passing parameters to partial view

What is the best practice regarding the *.gitignore* file with Git; should it be excluded from the repository or included? If it&#39;s conditional, what are the conditions for each circumstance?

Best Practice for Adding .gitignore to Repo

Until now I used [ActiveState][1]&#39;s [ActivePerl][2], and used the ppm for installing modules.

Last week I moved to [Strawberry Perl][3], but I don&#39;t know how I should install modules using Strawberry Perl. What is some information on how module installation is done using Strawberry Perl or is there some link on how to install new modules?

  [1]: https://en.wikipedia.org/wiki/ActiveState
  [2]: https://en.wikipedia.org/wiki/ActivePerl
  [3]: https://en.wikipedia.org/wiki/Strawberry_Perl


Installing modules using Strawberry Perl

<p>Until now I used <a href="https://en.wikipedia.org/wiki/ActiveState" target="_blank" rel="noopener noreferrer">ActiveState</a>'s <a href="https://en.wikipedia.org/wiki/ActivePerl" target="_blank" rel="noopener noreferrer">ActivePerl</a>, and used the ppm for installing modules.</p>
<p>Last week I moved to <a href="https://en.wikipedia.org/wiki/Strawberry_Perl" target="_blank" rel="noopener noreferrer">Strawberry Perl</a>, but I don't know how I should install modules using Strawberry Perl. What is some information on how module installation is done using Strawberry Perl or is there some link on how to install new modules?</p>


I want to run some c++ code on Linux and Windows.  There are some pieces of code that I want to include only for one operating system and not the other.  Is there a standard *#ifdef* that once can use?

Something like:

      #ifdef LINUX_KEY_WORD
        ... // linux code goes here.
      #elif WINDOWS_KEY_WORD
        ... // windows code goes here.
      #else 
      #error &quot;OS not supported!&quot;
      #endif


----------
The question is indeed a duplicate but the answers here are much better, especially the accepted one.

C++ compiling on Windows and Linux: ifdef switch

Recently I have been having some trouble using GnuWin32 from PowerShell whenever double quotes are involved.

Upon further investigation, it appears PowerShell is stripping double quotes from command line arguments, even when properly escaped.

&lt;!-- language: lang-none --&gt;

    PS C:\Documents and Settings\Nick&gt; echo &#39;&quot;hello&quot;&#39;
    &quot;hello&quot;
    PS C:\Documents and Settings\Nick&gt; echo.exe &#39;&quot;hello&quot;&#39;
    hello
    PS C:\Documents and Settings\Nick&gt; echo.exe &#39;\&quot;hello\&quot;&#39;
    &quot;hello&quot;

Notice that the double quotes are there when passed to PowerShell&#39;s **echo** cmdlet, but when passed as an argument to **echo.exe**, the double quotes are stripped unless escaped with a backslash (even though PowerShell&#39;s escape character is a backtick, not a backslash).

This seems like a bug to me. If I am passing the correct escaped strings to PowerShell, then PowerShell should take care of whatever escaping may be necessary for however it invokes the command.

What is going on here?

For now, the fix is to escape command line arguments in accordance with these rules (which seem to be used (indirectly) by the `CreateProcess` API call which PowerShell uses to invoke .exe files): 

 - To pass a double quote, escape with a backslash: `\&quot;` -&gt; `&quot;`
 - To pass a one or more backslashes followed by a double quote, escape each backslash with another backslash and escape the quote: `\\\\\&quot;` -&gt; `\\&quot;`
 - If not followed by a double quote, no escaping is necessary for backslashes: `\\` -&gt; `\\`

Note that further escaping of double quotes may be necessary to escape the double quotes in the Windows API escaped string to PowerShell.

Here are some examples, with **echo.exe** from GnuWin32:

&lt;!-- language: lang-none --&gt;

    PS C:\Documents and Settings\Nick&gt; echo.exe &quot;\`&quot;&quot;
    &quot;
    PS C:\Documents and Settings\Nick&gt; echo.exe &quot;\\\\\`&quot;&quot;
    \\&quot;
    PS C:\Documents and Settings\Nick&gt; echo.exe &quot;\\&quot;
    \\

I imagine that this can quickly become hell if you need to pass a complicated command line parameter. Of course, none of this documented in the `CreateProcess()` or PowerShell documentation.

Also note that this is not necessary to pass arguments with double quotes to .NET functions or PowerShell cmdlets. For that, you need only escape your double quotes to PowerShell.

**Edit:** As Martin pointed out in his excellent answer, this is documented in the `CommandLineToArgv()` function (which the CRT uses to parse the command line arguments) documentation.

PowerShell stripping double quotes from command line arguments

I am trying to escape a while loop. Basically, if the &quot;if&quot; condition is met, I would like to be able to exit this loop:

    private void CheckLog()
    {
        while (true)
        {
            Thread.Sleep(5000);
            if (!System.IO.File.Exists(&quot;Command.bat&quot;))
                continue;

            using (System.IO.StreamReader sr = System.IO.File.OpenText(&quot;Command.bat&quot;))
            {
                string s = &quot;&quot;;
                while ((s = sr.ReadLine()) != null)
                {
                    if (s.Contains(&quot;mp4:production/CATCHUP/&quot;))
                    {
                        RemoveEXELog();

                        Process p = new Process();
                        p.StartInfo.WorkingDirectory = &quot;dump&quot;;
                        p.StartInfo.FileName = &quot;test.exe&quot;;
                        p.StartInfo.Arguments = s;
                        p.Start();

                        &lt;&lt; Escape here - if the &quot;if&quot; condition is met, escape the loop here &gt;&gt;
                    }
                }
            }
        }
    }


How to escape a while loop in C#

    public static boolean isValidName(String text)
    {
        Pattern pattern = Pattern.compile(&quot;^[^/./\\:*?\&quot;&lt;&gt;|]+$&quot;);
        Matcher matcher = pattern.matcher(text);
        boolean isMatch = matcher.matches();
        return isMatch;
    }

Does this method guarantee a valid filename on Windows?

Validate a file name on Windows

I am trying to run a hello world program written in javascript in a separate file named hello.js

Currently running windows version of node.js.

The code runs perfectly in console window but **how do I reference the path in windows environment**.

    C:\abc\zyx\hello.js

in Unix I guess it is showing $ node hello.js

I&#39;m absolutely new to Node.js Please correct me if I am doing something wrong.

I tried 

`&gt; node  C:\abc\zyx\hello.js` ----didn&#39;t work

`    &gt; C:\abc\zyx\hello.js` --didn&#39;t work

**UPDATE1:**

Added node.exe to the folder where hello.js file is sitting.  
Added path point to the folder c:\abc\zyx\  and I get an error that says 

ReferenceError: hello is not defined

see contents of hello.js 

    setTimeout(function() {
    console.log(&#39;World!&#39;);
    }, 2000);
    console.log(&#39;Hello&#39;);

**UPDATE 2:**

So far I have tried all these version and **none of them seems to work**.  May be I am doing something completely wrong.

    &gt;node hello.js
    &gt;$ node hello.js
    &gt;node.exe hello.js
    &gt;node /hello.js
    &gt;node \hello.js
    &gt; \node \hello.js
    &gt; /node /hello.js
    &gt; C:\abc\xyz\node.exe C:\abc\xyz\hello.js
    &gt; C:\abc\xyz\node.exe C:/abc/xyz/hello.js
    &gt; hello.js
    &gt; /hello.js
    &gt; \hello.js
    &gt;node hello

**Refer to my file structure**

```
.
├── hello.js
├── node.exe
└── paths.txt
```

**RESOLVED:**
Instead of running node.exe, try running in command prompt with the following option and it worked.

    c:\&gt;node c:\abc\hello.js
    Hello
    World! (after 2 secs)



How to run a hello.js file in Node.js on windows?

I want to replace the word &quot;blue&quot; with &quot;red&quot; in all text files named as 1_classification.dat, 2_classification.dat and so on. I want to edit the same file so I tried the following code, but it does not work. Where am I going wrong?

    @files = glob(&quot;*_classification.dat&quot;);
    foreach my $file (@files)
    {
        open(IN,$file) or die $!;
        &lt;IN&gt;;
        while(&lt;IN&gt;)
        {
            $_ = &#39;~s/blue/red/g&#39;;
            print IN $file;
        }
        close(IN)
    }




How to replace a string in an existing file in Perl

I want to use curl to view the source of a page and if that source contains a word that matches the string then it will execute a print. How would I do a `if $string contains`?

In VB it would be like.

    dim string1 as string = &quot;1&quot;
    If string1.contains(&quot;1&quot;) Then
    Code here...
    End If

Something similar to that but in Perl.

Perl - If string contains text?

How can I check whether a given string contains a certain substring, using Perl?

More specifically, I want to see whether `s1.domain.com` is present in the given string variable.

Check whether a string contains a substring

I seem to have come across several different ways to find the size of an array. What is the difference between these three methods?

    my @arr = (2);
    print scalar @arr; # First way to print array size

    print $#arr; # Second way to print array size

    my $arrSize = @arr;
    print $arrSize; # Third way to print array size


Find size of an array in Perl

I haven&#39;t used Carp all that much because I&#39;ve generally rolled my own.  However, in the spirit of keeping with Core modules, I&#39;m using it now.  However, it seems like it&#39;s barely better than warn/die.

Furthermore, what does cluck/confess/verbose even do?  I&#39;ve ran this short script to get an idea of the output looks like (because the Carp docs don&#39;t do it).  It looks exactly the same on any run (besides the random strings).

      #!/usr/bin/perl

      package Warning;

      sub warning {
        warn &quot;warn&quot;;
      }

      package CWarn;
      use Carp qw(carp cluck);

      sub cwarn {
        int(rand(2)) ? carp &quot;carp&quot; : cluck &quot;cluck&quot;;
      }

      package Fatal;
      use Carp qw(confess croak);

      sub fatal {
        int(rand(2)) ? confess &quot;confess&quot; : croak &quot;croak&quot;;
      }

      package Loop;

      use v5.10;

      sub loop {
        say &#39;=&#39; x 80;
        Warning::warning();
        CWarn::cwarn();
        loop() unless ($c++ &gt; 10);
        Fatal::fatal();
      }

      package main;

      Warning::warning();
      CWarn::cwarn();
      Loop::loop();

**UPDATE:** Updated the script with package names and it does make a difference.  However, Carp still seems to be very basic in terms of logging information, and it doesn&#39;t support web output.  I guess I&#39;ll look at other ones like CGI::Carp, Log::Output, and Log::Log4Perl.

Content Type	Original Author	Original Content on Stackoverflow
Question	ronssd	View Question on Stackoverflow
Solution 1 - Windows	Alexandr Ciornii	View Answer on Stackoverflow
Solution 2 - Windows	Alex	View Answer on Stackoverflow
Solution 3 - Windows	James	View Answer on Stackoverflow
Solution 4 - Windows	Wes	View Answer on Stackoverflow

Installing modules using Strawberry Perl

Windows Problem Overview

Windows Solutions

Solution 1 - Windows

Solution 2 - Windows

Solution 3 - Windows

Solution 4 - Windows

Best Practice for Adding .gitignore to Repo

Passing parameters to partial view

Attributions